Pump-rod connection.



H. H. WIEGK & W. L. LARSON.

PUMP ROD CONNECTION.

APPLICATION FILED APR.26,1911.

1,010,334. Patented N0v.28,1911.

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one STATES PATENT onrro HENRY I-I. WIECK AND WILLIAM L. LARSON, OF AGATE, NORTT-I DAKOTA.

PUMP-ROD CON NEGTION.

To all whom it may concern:

Be it known that we, HENRY I-I. WIECK and WVILLLAM L. LARSON, citizens of the United States, residing at Agate, in the county of Rolette and State of North Dakota, have invented certain new and useful Improvements in Pump-Rod Connections, of which the following is a specification.

Our invention relates generally to yielding connections between two sections of a reciprocating element and relates particularly to a yielding connection peculiarly adapted for connecting two sections of a pump rod, such as the pump rod on a windmill or like apparatus.

The primary object of the invention is the provision of a very simple, convenient and effective device, which when used to connect two sections of a pump rod, will act to prevent breakage of the rod, due to undue strain either on a down stroke or on an up stroke of the rod. It is oftentimes the case, particularly in winter when the water in a pump becomes frozen, that the pump rod is put under so much stress that it breaks.

Our invention is intended to entirely obviate this difficulty so that no matter what obstruction there may be to the reciprocation of the pump rod, the pump rod will not break, but the connection which forms the subject of our invention will permit one section of the pump rod to slide upon the other, and permit an automatic connection to be made between the two sections of the pump rod when the obstruction has been removed.

Our invention is illustrated in the accompanying drawings, wherein:

Figure 1 is a perspective view of our invention; Fig. 2 is a side elevation of the same; Fig. 3 is a face view of one of the guide strips; Fig. 4 is a face view of the post guiding strip; and, Fig. 5 is a detail perspective view of the minor parts of our device separated from each other and detached from the pump rod and guide strips.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

Referring to these drawings, 2 and 3 designate opposed sections of a pump rod connected at one end to any suitable pump and at the other end to any suitable actuating means, whereby the two sections of the pump rod may be given a reciprocating movement. Ordinarily, these two sections 2 and 3 would Specification of Letters Patent.

Application filed April 26, 1911.

Patented Nov. 28, 1911.

Serial No. 623,552.

be continuous or integral, but it will be seen that with my invention the two sections are spaced from each other. Attached to the section 2 is a guide 4 consisting of a strip of material of any suitable length greater than thenormal distance between the sections 2 and 3 of the pump rod, this strip of material 4 being attached firmly at one end to the section 2 by means of the bolts 5. The strip 4 is capable of a sliding movement upon the section 3 of the pump rod and is guided in its engagement with the section 3 of the rod by means of the U-shaped yoke 6 which may be conveniently formed of sheet metal or malleable iron and whose side flanges are attached to the section 3 of the pump rod by means of bolts 7 This clip or yoke 6 holds the strip 4 in engagement with the face of the section 3. Attached to theother face of the section 3 is a strip 8 having the same width as the strip 4 and being made preferably of metal. The strip 8 extends upward and overlaps the section 2 of the pump rod and is held in engagement with the face of the section 2 by means of a U-shaped clip or yoke 9. The clip or yoke 9 has precisely the same form and purpose as the clip or yoke 6 and is intended to hold the strip 8 in snug engagement with the face of the section 2, to permit the strip 8 to have a sliding movement upon the face of the'section 2 when necessary.

The strip 4 is longitudinally slotted, as at 10. Attached to the strip 8 upon its inside face is a block 11 of any suitable material and provided with the lateral base flanges 12 which are bolted to the strip 8. The block 11 is tubular and through it passes a bolt 13. The head of this bolt bears against the outer face of the strip 8 and the bolt extends through the block 11, through the slot 10 in the strip 4 and projects a distance beyond the outer face of the strip 4. His provided upon its extremity with the wing nut 14. Surrounding the bolt 13 and interposed between the wing nut 14 and a washer 15, which bears against the outer face of the strip 4, is a coil spring 16. This spring should be relatively strong so that the strip 4 may be forced into frictional engagement with the face of the block 11. By screwing up on the wing 'nut 14, the compressive tension of the spring 16 may be increased to any extent desired.

Attached to the inner face of the strip 4 and movable therewith is a block 17 whose upper face is beveled or inclined upward or toward the strip 8, as at 18. This block 17 is held in place upon the strip 4 by means of bolts 19, or in any other suitable manner. The strip 8 is slotted at 20 to accommodate a dog 21. This dogis pivoted upon the face of the strip 8 by means of a pivot bolt 22. Attached to the face of the strip 8 on each side of the slot 20 and therefore on each side of the dog 21, are the angle pieces 23. Each of these pieces is perforated at its upper outer corner as at 24 and the dog is provided with a perforation 25 which is adapted to register with the perforation 24 so that a pin may be passed through the perforations 24 and 25 so as to hold the dog from movement when desired. The upper end of the strip 8 is pro vided with small angular bracket 26 which constitutes a lug projecting out from the face of the strip 8. Attached to the outer end of the dog 21 is the relatively weak coil spring 27 which at its upper end is formed with a head 28 having a swiveled engagement with a tensioning screw 29 which passes through the opening inthe lug or bracket 26 and is provided on its head with a wing nut 30. By turning this wing nut 30 up or down, the tension of the spring 27 may be adjusted.

The operation of our invention is as fol lows: Under normal circumstances and where there is nothing to impede the full stroke of the piston rod, the parts will remain in the position shown in Fig. 2, by reason of the frictional engagement between the block 11 and the guide strip 4 and by reason of the engagement of the block 17 with the dog 21. When, however, the lower section of the rod is for any reason impeded so that the descent and ascent of the section 2 would act to break the piston rod, then the parts will give so as to permit the section 2 to have a movement relative to the section 3. hen the impeding material in the pump has been removed, however, as for instance by the melting of ice or the cleaning out of the pump, the reciprocation of the rod 2 will cause the parts to take their normal position. It will be understood that the dog prevents any lost motion such as would occur where spring connection was used between two sections of the pump rod, and that the spring 16 acts to force the parts into such frictional engagement that both of the sections of the pump rod are normally moved together as one. If, upon an up stroke, the section 3 is impeded, the section 2 will continue its upward movement and as a consequence the dog 21 will be tripped by the block 17, the dog will turn upon its pivot, against the force of the spring 27, and the block will pass the dog. Upon the neXt down stroke of the section 2, the block 17 will be carried beyond the dog and the dog will once more occupy the position illustrated in Fig. 2. If the movement of the section 3 is still impeded, then the dog will be again tripped. If, however, the impedance has been relieved, the block 17 will engage beneath the dog upon the up stroke of the section 2, and the strip 8 and section 3 will be raised. If upon a down stroke the section 3 is impeded, the section 2 will continue its downward movement, the guide strip 4 simply slipping past the washer 15 .and sliding upon the face of the section 3.

Upon an up stroke the section 2 will rise without affecting the section 3 until the block 17 engages beneath the dog, whereupon, if there is nothing to impede the rise of the section 3, the block 17 will engage beneath the dog and both sections 2 and 3 will rise together.

WVhile we do not wish to be limited to any particular material or proportions for the various parts, we may state that the pump rods may be made either of gas pipe or of wood. The block 17 is preferably made of iron and the guide strips 4 and 8 are preferably made of malleable iron about two inches wide and forty inches long. The block 11 is preferably made of cast iron.

It will be seen that the dog 21 constitutes a yielding stop which normally is in engagement with the abutment block 17 so that the parts are yieldably held in proper relation to each other, to permit the sections 2 and 3 to move toward each other. It will also be seen that the strips or bars 4 and 8 which act to hold one section of the rod upon the other section, constitute extensions of the rod sections and that the rod sections therefore have a sliding engagement with each other by means of the guide strips or bars 4 and S.

The object of beveling the upper end of the block 17 is to secure a very small leverage upon the dog 21 when the parts are in the position shown in Fig. 2. If the section 2 slides upward relatively to the section 3, it will be seen that the edge of the block 17 will engage wit-h the dog 21 very close to the pivot 22 of the dog and that considerable force will therefore be required to trip the dog until the dog has moved beyond a horizontal position; Upon a downward movement of the block 17 relative to the dog,

when the block 17 is above the dog, only a.

slight force will be required for the tripping action.

It may be observed that the dog 21 is a very important part of our invention, as without it the device would depend upon friction alone as a means for keeping the pump rod normally in its proper relation. It takes considerable power on the upward stroke on a deep well, whereas very little power is necessary in the downward stroke, as the pump rod and connections w1ll drop that upon a down stroke with the pump rod frozen, the pump rod would break. With the dog 21,.however, we need only apply a small amount of friction on the slide 4: with spring 16, as the dog 21 acts with the spring 27 and spring 16 to form the proper resistance for any deep well. The dog 21, however, forms a solid shoulder against which the block 17 will remain stationary when there is no unnecessary strain. As soon, however, as the strain becomes too great,

.the dog 21 will trip and allow the block 17 to merely pass the dog 21 and the dog will continue to trip until the pump rod is relieved. Hence if the pump rod becomes held or frozen on the downward stroke, spring 16 will only have to act, as the dog 21 will remain stationary. If the pump rod, however, becomes held or frozen on an upward stroke, the dog 21 will trip and in conjunction with the spring 16 will allow the block 17 to pass the dog. It will be seen that the frictional spring 16, together with the dog 21 and spring 27, when properly adjusted, will allow the pump rod to make a complete stroke either way.-

Having thus described the invention, what is claimed as new is:

1. The combination with a reciprocating member formed of two sections having sliding engagement with each other, of means for holding the sections in frictional engagement with each other, a pivoted dog carried by one section and projecting into the path of movement of the other section, and a spring acting to yieldingly impede the movement of the dog in one direction but permitting the free movement of the dog in the other direction.

2. The combination with a reciprocating member formed of two sections having sliding engagement with each other, of means for holding the sections in frictional engagement .with each other, an abutment carried by one of said sections, and a pivoted dog carried by the other section and projecting into the path of movement of the abutment, said dog being normally held in yielding engagement with said abutment.

3. The combination with a reciprocating member formed of two separated sections, of guide strips attached to each of the sections and extending over the other section and having sliding engagement therewith, means holding the guide strips in frictional engagement with each other, an abutment carried on one strip, and adog carried on the other strip and held in yielding engagement with the abutment.

4:. The combination with a reciprocating member formed of two separated sections, of a guide strip attached to each of the sections and extending over the other section and having sliding engagement therewith, means on one strip frictionally'engaging the other strip, an abutment carried upon one guide strip, a dog pivoted upon the other guide strip and projecting into the path of movement of said abutment, and a spring holdingthe dog in its normal position, but permitting the abutment to pass the dog.

5. The combination with a reciprocating member formed of two separated sections, of guide strips attached one to eachof the sections and extending over and having sliding engagement with the other section, a block carried upon one guide strip and contacting with the other guide strip, means for forcing the guide strips toward each other and the second named strip against said block, an abutment carried upon one guide strip, a pivoted dog carried upon the other guide strip and projecting into the path of movement of the abutment, and a contractile spring holding the dog in its projected position, but permitting the dog to yield to allow the abutment to pass.

6. The combination with a pump rod formed of two separated sections, of guide strips attached one to each of the sections, each guide strip extending over and having sliding engagement with the other section, friction devices carried by one guide strip and frictionally engaging the other guide strip, guiding clips mounted upon each section and engaging the guide strip of the other section, and an abutment having an inclined face mounted upon one of the guide strips and extending toward the other guide strip, a dog pivoted upon the second named guide strip and projected into the path of movement of the abutment and normally engaging therewith, and a contractile spring holding the said dog in its projected position to permit the dog to yield.

7. The combination with a pump rod formed of two separated sections, of guide strips attached one to each of the sections, each guide strip extending over and having sliding engagement with the other section, friction devices carried by one guide strip and frictionally engaging the other guide strip, guiding clips mounted upon each sec tion and engaging the guide strip of the other section, and an abutment having an inclined face mounted upon one of the guide strips and extending toward the other guide strip, a dog pivoted upon the second named guide strip and projected into the path of movement of the abutment and normally engaging therewith, a contractile spring holding the said dog in its projected position to permit the dog to yield, and means for adjusting the tension of the spring.

8. The combination with a reciprocating member formed of two separated sections, of guide strips attached one to each of the sections, each guide strip extending over and having sliding engagement with the other section, a block mounted on one strip and contacting with the inner face of the other strip, a bolt passing through said block and through a slot in the other strip, a spring surrounding the bolt and forcing the secon named strip into frictional engagement with the block, an abutment carried upon one strip, a dog pivoted upon the other strip and normally projecting into the path of movement of the abutment to engage therewith, a contractile spring attached to the end of the dog and to the strip upon which the dog is mounted, and means for adjusting the tension of said springs.

In testimony whereof, we afiix our signatures in presence of two witnesses.

HENRY H. WIECK. [L.s.] WILLIAM L. LARSON. Witnesses:

C. F. NELSON, A. J. EDELBROCK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

